diff --git a/src/content/Content.cpp b/src/content/Content.cpp
index 6184edb7..d1074005 100644
--- a/src/content/Content.cpp
+++ b/src/content/Content.cpp
@@ -20,6 +20,7 @@ void ContentBuilder::add(Block* def) {
 
 Content* ContentBuilder::build() {
     vector<Block*> blockDefsIndices;
+    DrawGroups* groups = new DrawGroups;
     for (const string& name : blockIds) {
         Block* def = blockDefs[name];
         
@@ -44,18 +45,22 @@ Content* ContentBuilder::build() {
         }
 
         blockDefsIndices.push_back(def);
+        if (groups->find(def->drawGroup) == groups->end()) {
+            groups->insert(def->drawGroup);
+        }
     }
     ContentIndices* indices = new ContentIndices(blockDefsIndices);
-    return new Content(indices, blockDefs);
+    return new Content(indices, groups, blockDefs);
 }
 
 ContentIndices::ContentIndices(vector<Block*> blockDefs)
                : blockDefs(blockDefs) {
 }
 
-Content::Content(ContentIndices* indices,
+Content::Content(ContentIndices* indices, DrawGroups* drawGroups,
                  unordered_map<string, Block*> blockDefs)
         : blockDefs(blockDefs),
+          drawGroups(drawGroups),
           indices(indices) {
 }
 
diff --git a/src/content/Content.h b/src/content/Content.h
index 184d866d..70c68cc6 100644
--- a/src/content/Content.h
+++ b/src/content/Content.h
@@ -4,8 +4,11 @@
 #include <string>
 #include <vector>
 #include <unordered_map>
+#include <set>
 #include "../typedefs.h"
 
+typedef std::set<unsigned char> DrawGroups;
+
 class Block;
 class Content;
 
@@ -46,8 +49,9 @@ class Content {
     std::unordered_map<std::string, Block*> blockDefs;
 public:
     ContentIndices* const indices;
-    
-    Content(ContentIndices* indices, 
+    DrawGroups* const drawGroups;
+
+    Content(ContentIndices* indices, DrawGroups* drawGroups,
             std::unordered_map<std::string, Block*> blockDefs);
     ~Content();
     
diff --git a/src/definitions.cpp b/src/definitions.cpp
index 354c293e..20c80b2c 100644
--- a/src/definitions.cpp
+++ b/src/definitions.cpp
@@ -57,7 +57,7 @@ void setup_definitions(ContentBuilder* builder) {
 	builder->add(block);
 
 	block = new Block("base:water", "water");
-	block->drawGroup = 4;
+	block->drawGroup = 3;
 	block->lightPassing = true;
 	block->skyLightPassing = false;
 	block->obstacle = false;
@@ -73,7 +73,7 @@ void setup_definitions(ContentBuilder* builder) {
 	builder->add(block);
 
 	block = new Block("base:grass", "grass");
-	block->drawGroup = 5;
+	block->drawGroup = 1;
 	block->lightPassing = true;
 	block->obstacle = false;
 	block->replaceable = true;
@@ -82,7 +82,7 @@ void setup_definitions(ContentBuilder* builder) {
 	builder->add(block);
 
 	block = new Block("base:flower", "flower");
-	block->drawGroup = 5;
+	block->drawGroup = 1;
 	block->lightPassing = true;
 	block->obstacle = false;
 	block->replaceable = true;
diff --git a/src/graphics/BlocksRenderer.cpp b/src/graphics/BlocksRenderer.cpp
index 1e75ee93..922cf72f 100644
--- a/src/graphics/BlocksRenderer.cpp
+++ b/src/graphics/BlocksRenderer.cpp
@@ -374,12 +374,12 @@ vec4 BlocksRenderer::pickSoftLight(float x, float y, float z,
 void BlocksRenderer::render(const voxel* voxels, int atlas_size) {
 	int begin = chunk->bottom * (CHUNK_W * CHUNK_D);
 	int end = chunk->top * (CHUNK_W * CHUNK_D);
-	for (ubyte group = 0; group < 8; group++) {
+	for (const auto drawGroup : *content->drawGroups) {
 		for (int i = begin; i < end; i++) {
 			const voxel& vox = voxels[i];
 			blockid_t id = vox.id;
 			const Block& def = *blockDefsCache[id];
-			if (!id || def.drawGroup != group)
+			if (!id || def.drawGroup != drawGroup)
 				continue;
 			const UVRegion texfaces[6]{ cache->getRegion(id, 0), cache->getRegion(id, 1),
 										cache->getRegion(id, 2), cache->getRegion(id, 3),
diff --git a/src/graphics/Framebuffer.cpp b/src/graphics/Framebuffer.cpp
index ab980b1b..77ae7462 100644
--- a/src/graphics/Framebuffer.cpp
+++ b/src/graphics/Framebuffer.cpp
@@ -26,6 +26,7 @@ Framebuffer::Framebuffer(uint width, uint height) : width(width), height(height)
 Framebuffer::~Framebuffer() {
 	delete texture;
 	glDeleteFramebuffers(1, &fbo);
+    glDeleteRenderbuffers(1, &depth);
 }
 
 void Framebuffer::bind() {
diff --git a/src/voxels/Chunks.h b/src/voxels/Chunks.h
index 5798555b..687499f2 100644
--- a/src/voxels/Chunks.h
+++ b/src/voxels/Chunks.h
@@ -8,7 +8,7 @@
 
 class VoxelRenderer;
 
-class AABB;
+struct AABB;
 class Content;
 class ContentIndices;
 class Chunk;